New gathering of the Pleistocene megafauna remains at the alluvial locations of the Upper Ob region in 2017

One thousand five and hundred fifty bones of large mammals were collected on the sand bank of the Ob River near Bibikha village in 2017. Their larger part belongs to the Middle Pleistocene, and the smaller part belongs to the Early and Late Pleistocene. The source of the bones is unknown. Individual remains of the Early Pleistocene species have been found, including Panthera fossilis, Stephanorhinus kirchbergensis, Cervalces latifrons, Praeovibos sp., and Soergelia sp. One thousand and eighty megafaunal remains were collected in the riverbed and shoal areas of the Chick River in 2017. The remains of the Bos primigenius are represented by an intact metacarpal bone discovered for the first time at this location. One thousand five hundred and thirty five bone remains were gathered on the beaches, shallows, and shoals of the Chumysh River in 2017. In total, the collected or recorded bones of megafauna at three locations amounted to (bones/ species): Bibikha - 3409/18, Chick - 2836/19, Chumysh - 11234/23. The greatest part of bone remains from the Chumysh and Chick Rivers were dated by on 14C to the Karginsky interstadial.